CN110823151B - Test tool for underwater pull rope sensor - Google Patents
Test tool for underwater pull rope sensor Download PDFInfo
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- CN110823151B CN110823151B CN201910979298.8A CN201910979298A CN110823151B CN 110823151 B CN110823151 B CN 110823151B CN 201910979298 A CN201910979298 A CN 201910979298A CN 110823151 B CN110823151 B CN 110823151B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
Abstract
The invention discloses a test tool for an underwater pull rope sensor. The water containing barrel comprises an end cover and a barrel-shaped body. The magnetic plate is arranged on the outer side wall of the cylindrical body, scales distributed along the length direction of the cylindrical body are arranged on the magnetic plate, and the ferromagnetic sliding block is slidably positioned on the magnetic plate. The pulley block is installed at one end of the cylindrical body, and a rope outlet hole is formed in the side wall of one end of the cylindrical body. Can flourishing water in the flourishing water section of thick bamboo, the simulation is the environment under water, is located this internal one end of tube-shape with the haulage rope and is connected with the stay cord sensor, through adsorbing the different positions on the magnetic sheet with ferromagnetic slider, the actual length of stay cord pulling can be reflected to the scale on the magnetic sheet, compares the actual length of stay cord pulling and the displacement that the stay cord sensor detected under water, can determine this measuring accuracy of stay cord sensor under water, and test procedure is simple, ensures that the error of stay cord sensor is in the requirement scope under water.
Description
Technical Field
The invention relates to the field of test tools, in particular to a test tool for an underwater pull rope sensor.
Background
An underwater pull rope sensor is one type of displacement sensor. The underwater pull rope sensor is generally used underwater, and when the underwater pull rope sensor is used, the length of the pull rope pulled out is the detected displacement.
The problem of overlarge measurement error can occur before the underwater pull rope sensor leaves a factory or after the underwater pull rope sensor is used for a long time, so that the detection accuracy is influenced.
Disclosure of Invention
The embodiment of the invention provides a test tool for an underwater pull rope sensor, which can be used for conveniently testing the underwater pull rope sensor. The technical scheme is as follows:
the embodiment of the invention provides a test tool for an underwater pull rope sensor, which comprises a water containing barrel, a traction rope, a pulley block, a magnetic plate and a ferromagnetic slide block, wherein the water containing barrel comprises an end cover and a barrel-shaped body with one closed end, the end cover is connected to the other end of the barrel-shaped body in an openable and closable manner relative to the barrel-shaped body, the magnetic plate is arranged on the outer side wall of the barrel-shaped body, scales distributed along the length direction of the barrel-shaped body are arranged on the magnetic plate, the ferromagnetic slide block is slidably positioned on the magnetic plate, the pulley block is arranged at one end of the barrel-shaped body, a rope outlet hole is formed in the side wall of one end of the barrel-shaped body, the traction rope is wound on the pulley block, the traction rope is positioned in the rope outlet hole, one end of the traction rope, which is positioned outside the barrel-shaped body, is, the end cover is provided with a sensor mounting structure, and one end of the traction rope, which is positioned in the cylindrical body, is used for being connected with an underwater pull rope sensor to be tested.
Optionally, the magnetic plate is slidably mounted on the cylindrical body along a length direction of the cylindrical body.
Optionally, a stopper is disposed on an outer side wall of the cylindrical body, the magnetic plate and the stopper are sequentially arranged along a length direction of the cylindrical body, and a distance adjusting member is disposed between the stopper and the magnetic plate.
Optionally, the distance adjusting member comprises a threaded mandril, the threaded mandril is in threaded connection with the stop block, and the end part of the threaded mandril is rotatably connected with the magnetic plate, or
The threaded ejector rod is in threaded connection with the magnetic plate, and the end part of the threaded ejector rod is rotatably connected with the stop block.
Optionally, the end of the threaded mandrel is spherical.
Optionally, the distance adjusting member includes a threaded sleeve, a first screw and a second screw which are coaxial, the thread turning directions of the first screw and the second screw are opposite, one end of the first screw is fixed on the stopper, one end of the second screw is fixed on the magnetic plate, and two ends of the threaded sleeve are respectively in threaded connection with the first screw and the second screw.
Optionally, the outer side wall of the cylindrical body has a sliding groove, and the magnetic plate is mounted in the sliding groove.
Optionally, a hook is arranged on the inner side wall of the end cover, and a rope ring is arranged at one end of the traction rope in the cylindrical body.
Optionally, the cartridge has at least one pipe connection thereon.
Optionally, a display screen for displaying the detection length of the underwater pull rope sensor to be tested is arranged on the outer side wall of the end cover.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
through setting up flourishing water drum, haulage rope, assembly pulley, magnetic plate and ferromagnetic slider, flourishing water drum includes a confined tube-shape body and end cover, has sensor mounting structure on the end cover for can open the end cover, install the stay cord sensor under water that will await measuring on the end cover, through installing the assembly pulley in the one end of tube-shape body, have out the rope hole on the tube-shape body, make and to twine the haulage rope on the pulley, make the haulage rope stretch out the tube-shape body through going out the rope hole. Through installing the magnetic sheet on the lateral wall of tube-shape body, ferromagnetic slider slidable lies in the magnetic sheet on, and the haulage rope is connected on ferromagnetic slider for can remove ferromagnetic slider pulling haulage rope, and can utilize the magnetic sheet to ferromagnetic slider's appeal, make ferromagnetic slider can adsorb the optional position on the magnetic sheet. When stay cord sensor under water in the test, can flourishing water in the flourishing water section of thick bamboo, the simulation is environment under water, is connected with stay cord sensor with the one end that the haulage rope is located the tube-shape this internal, through adsorbing the different positions on the magnetic sheet with ferromagnetic slider, the actual length of stay cord pulling can be reacted to the scale on the magnetic sheet, compares the actual length of stay cord pulling and the displacement that stay cord sensor detected under water, can determine this measuring accuracy of stay cord sensor under water, ensures that the error of stay cord sensor is in the requirement within range under water. The test process is simple, and the underwater environment is simulated, so that the test result is accurate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a test fixture of an underwater pull rope sensor according to an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a schematic structural diagram of another testing tool for an underwater pull rope sensor according to an embodiment of the present invention;
fig. 4 is a schematic partial structural view of a test fixture of an underwater pull rope sensor according to an embodiment of the present invention;
fig. 5 is a partial structural schematic view of another testing tool for an underwater pull rope sensor according to an embodiment of the present invention;
fig. 6 is a partial structural schematic view of another testing tool for an underwater pull rope sensor according to an embodiment of the present invention;
fig. 7 is a schematic partial enlarged structural view of a test fixture of an underwater pull rope sensor according to an embodiment of the present invention;
fig. 8 is an external structural schematic diagram of an end cap according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a test fixture of an underwater pull rope sensor according to an embodiment of the present invention. As shown in FIG. 1, the test tool for the underwater pull rope sensor comprises a water containing barrel 10, a traction rope 20, a pulley block 30, a magnetic plate 40 and a ferromagnetic slide block 50.
The water container 10 includes an end cap 11 and a tubular body 12 having one end closed, and the end cap 11 is connected to the other end of the tubular body 12 to be openable with respect to the tubular body 12.
The magnetic plate 40 is mounted on the outer side wall of the cylindrical body 12. Fig. 2 is a top view of fig. 1. As shown in fig. 2, the magnetic plate 40 has graduations distributed along the longitudinal direction of the cylindrical body 12. A ferromagnetic slider 50 is slidably located on the magnetic plate 40.
The pulley block 30 is installed at one end of the cylindrical body 12, a rope outlet hole 12a is formed in a side wall of the one end of the cylindrical body 12, the traction rope 20 is wound on the pulley block 30, and the traction rope 20 is located in the rope outlet hole 12 a. One end of the traction rope 20, which is positioned outside the cylindrical body 12, is connected with the ferromagnetic sliding block 50, the end cover 11 is provided with a sensor mounting structure, and one end of the traction rope 20, which is positioned inside the cylindrical body 12, is used for being connected with an underwater pull rope sensor to be tested.
Through setting up flourishing water drum, haulage rope, assembly pulley, magnetic plate and ferromagnetic slider, flourishing water drum includes a confined tube-shape body and end cover, has sensor mounting structure on the end cover for can open the end cover, install the stay cord sensor under water that will await measuring on the end cover, through installing the assembly pulley in the one end of tube-shape body, have out the rope hole on the tube-shape body, make and to twine the haulage rope on the pulley, make the haulage rope stretch out the tube-shape body through going out the rope hole. Through installing the magnetic sheet on the lateral wall of tube-shape body, ferromagnetic slider slidable lies in the magnetic sheet on, and the haulage rope is connected on ferromagnetic slider for can remove ferromagnetic slider pulling haulage rope, and can utilize the magnetic sheet to ferromagnetic slider's appeal, make ferromagnetic slider can adsorb the optional position on the magnetic sheet. When stay cord sensor under water in the test, can flourishing water in the flourishing water section of thick bamboo, the simulation is environment under water, is connected with stay cord sensor with the one end that the haulage rope is located the tube-shape this internal, through adsorbing the different positions on the magnetic sheet with ferromagnetic slider, the actual length of stay cord pulling can be reacted to the scale on the magnetic sheet, compares the actual length of stay cord pulling and the displacement that stay cord sensor detected under water, can determine this measuring accuracy of stay cord sensor under water, ensures that the error of stay cord sensor is in the requirement within range under water. The test process is simple, and the underwater environment is simulated, so that the test result is accurate.
As shown in fig. 1, the pulley block 30 may include 3 fixed pulleys 31, wherein two fixed pulleys 31 are located inside the cylindrical body 12 and one fixed pulley 31 is located outside the cylindrical body 12. The fixed pulley 31 can change the extending direction of the pulling rope 20, so that the pulling rope 20 can smoothly extend through the rope outlet hole 12 a. And the extension directions of one section of the hauling cable 20 in the cylindrical body 12 and one section of the hauling cable outside the cylindrical body 12 are opposite, which is beneficial to reducing the volume of the testing tool.
The arrangement of the pulley arrangement 30 shown in fig. 1 is merely an example, and the pulley arrangement 30 may have other arrangements, for example, the pulley arrangement 30 may include only two fixed pulleys 31, one fixed pulley 31 being located inside the cylindrical body 12 and the other fixed pulley 31 being located outside the cylindrical body 12. In order to improve the accuracy of the test, when the traction rope 20 is tensioned, the part of the traction rope 20 between the pulley block 30 and the ferromagnetic slider 50 is parallel to the magnetic plate 40.
As shown in fig. 2, the cartridge 10 may have at least one pipe connector 13 thereon. The water can be conveniently injected into or discharged from the water containing cylinder 10 through the pipe joint 13. The pipe joint 13 may be provided on the side wall of the water container 10 or at the end of the water container 10.
Optionally, the pipe joint 13 may be connected to a switch valve (not shown), and when water is filled, the switch valve may be connected to a water pipe for water filling, and the switch valve is opened, and during the test, the switch valve is kept closed, and after the test is finished, the switch valve may be opened, so as to drain the water in the water containing barrel 10.
A water level gauge (not shown) may be further provided on the outer wall of the water bucket 10 so as to control the amount of water in the water bucket 10.
The water bucket 10 may be a rectangular parallelepiped shape to facilitate placement of the water bucket 10 and installation of structures located on the outer wall of the water bucket 10.
Fig. 3 is a schematic structural diagram of another testing tool for an underwater pull rope sensor according to an embodiment of the present invention. As shown in fig. 3, compared to the test fixture shown in fig. 1, the test fixture for an underwater pull rope sensor has a magnetic plate 40 slidably mounted on a cylindrical body 12 along a length direction of the cylindrical body 12. Because the magnetic plate 40 can slide relative to the tubular body 12 along the length direction of the tubular body 12, the test fixture can be zeroed during testing, for example, the following way can be adopted for zeroing:
after the underwater pull rope sensor to be tested is installed in the testing tool, the ferromagnetic slide block 50 can be firstly adsorbed at the zero scale mark on the magnetic plate 40, at this time, if the displacement detected by the underwater pull rope sensor is not 0, the magnetic plate 40 can be moved along the length direction of the cylindrical body 12, the ferromagnetic slide block 50 moves along with the magnetic plate 40 until the displacement detected by the underwater pull rope sensor is 0, and the zero setting is completed. Wherein, the zero scale mark is the scale mark closest to the rope outlet hole 12a in the scale.
The cylindrical body 12 can be a ferromagnetic structure, and the magnetic plate 40 has magnetism and can be adsorbed on the outer wall of the cylindrical body 12, so that the magnetic plate 40 can be conveniently installed. The ferromagnetic slider 50 may be a ferromagnetic structure member to be attracted by the magnetic plate 40. For example, the cylindrical body 12 and the ferromagnetic slider 50 may be made of stainless steel, and may be attracted by the magnetic plate 40 and may be prevented from being rusted.
As shown in fig. 3, the cylindrical body 12 may have a sliding groove 60 on an outer side wall thereof, and the magnetic plate 40 is mounted in the sliding groove 60. The sliding groove 60 can limit the moving direction of the magnetic plate 40, so that the magnetic plate 40 can only slide in the length direction of the cylindrical body 12.
In one possible implementation of the present invention, the sliding groove 60 may be formed by two parallel spaced ribs 121 and the outer wall of the cylindrical body 12. Two ribs 121 are located on the outer wall of the cylindrical body 12.
In another possible implementation of the present invention, the sliding groove 60 may be a strip-shaped groove on the outer wall of the cylindrical body 12.
As shown in fig. 3, a stopper 122 may be further disposed on an outer side wall of the cylindrical body 12, the magnetic plate 40 and the stopper 122 are sequentially arranged along a length direction of the cylindrical body 12, and a distance adjusting member is disposed between the stopper 122 and the magnetic plate 40. Set up dog 122 and interval regulating part for can adjust the interval between magnetic sheet 40 and the dog 122 through interval regulating part, conveniently zero set test fixture.
Fig. 4 is a schematic partial structural view of a test fixture of an underwater pull rope sensor according to an embodiment of the present invention. As shown in fig. 4, the spacing adjustment member may include a threaded post 70, the threaded post 70 being threadedly coupled to the stopper 122, an end of the threaded post 70 being rotatably coupled to the magnetic plate 40. When the threaded mandril 70 is screwed, the threaded mandril 70 can extend and contract relative to the stop block 122, so that the magnetic plate 40 is driven to move.
As shown in fig. 4, the magnetic plate 40 may have a protrusion 41 thereon, the threaded rod 70 may be connected to the protrusion 41, the protrusion 41 may facilitate the connection between the threaded rod 70 and the magnetic plate 40, and facilitate the arrangement of the thinner magnetic plate 40, thereby reducing the cost.
Alternatively, the end of the threaded mandrel 70 may be spherical. The end of the threaded mandril 70 is connected with the magnetic plate 40, and the end of the threaded mandril 70 is arranged to be spherical, so that the abrasion between the threaded mandril 70 and the magnetic plate 40 can be favorably reduced.
The projection 41 is correspondingly provided with a spherical receiving groove 41a for receiving an end of the threaded mandril 70. As shown in fig. 4, the protrusion 41 may include two parts detachably coupled to facilitate the insertion of the end of the threaded push rod 70 into the receiving groove 41 a.
Fig. 5 is a partial structural schematic view of another testing tool for an underwater pull rope sensor according to an embodiment of the present invention. As shown in fig. 5, the threaded rod 70 may be screwed to the magnetic plate 40, and the end of the threaded rod 70 may be rotatably connected to the stopper 122. The spacing adjustment member shown in fig. 5 can also adjust the spacing between the magnetic plate 40 and the stopper 122. The magnetic plate 40 may also have a protrusion 41, the threaded rod 70 is screwed with the protrusion 41, and the stopper 122 may have a receiving groove 122a for receiving an end of the threaded rod 70. As shown in fig. 5, the stop 122 may comprise two parts that are removably coupled to facilitate placement of the end of the threaded mandrel 70 into the receiving slot 122 a.
Fig. 6 is a partial structural schematic view of another testing tool for an underwater pull rope sensor according to an embodiment of the present invention. As shown in fig. 6, the spacing adjustment member may include a threaded sleeve 71, a first screw 72 and a second screw 73 that are coaxial. The screw thread directions of the first screw 72 and the second screw 73 are opposite, one end of the first screw 72 is fixed on the stopper 122, one end of the second screw 73 is fixed on the magnetic plate 40, and two ends of the threaded sleeve 71 are respectively in threaded connection with the first screw 72 and the second screw 73. Because the screw thread turning directions of the first screw rod 72 and the second screw rod 73 are opposite, when the threaded sleeve 71 is screwed, the first screw rod 72 and the second screw rod 73 can move relatively, the total length of the distance adjusting piece is changed, and therefore the distance between the magnetic plate 40 and the stop block 122 can be adjusted, and the test tool can be zeroed.
As shown in fig. 6, the magnetic plate 40 may also be provided with a protrusion 41, and the second screw 73 may be connected to the protrusion 41 to facilitate the connection of the second screw 73 to the magnetic plate 40.
Fig. 7 is a schematic view of a partially enlarged structure of a test fixture of an underwater pull rope sensor according to an embodiment of the present invention. As shown in fig. 7, the sensor mounting structure on the end cap 11 may include a threaded hole 11a, and the underwater pull rope sensor may be mounted on the end cap 11 by screws and the threaded hole 11a at the time of testing.
The sensor mounting structure shown in fig. 7 is merely an example, and the sensor mounting structure may be the same structure as that of the underwater pull rope sensor to be tested in actual use. For example, when the underwater pull rope sensor to be tested is actually installed through the clamping groove, the sensor installation structure on the end cover 11 may be the same clamping groove.
As shown in fig. 7, the inner side wall of the end cap 11 may be further provided with a hook 111, and one end of the pulling rope 20 located inside the cylindrical body 12 may be provided with a rope ring 21. Finish at the test like this, demolish stay cord sensor under water after, can catch on becket bridle 21 through couple 111, avoid haulage rope 20 to remove to the 12 depths of tube-shape body to connect haulage rope 20 and stay cord sensor under water when testing once more.
Alternatively, the end cap 11 may be hinged to the tubular body 12, so that the end cap 11 can be opened and closed by flipping the end cap 11, and since the end cap 11 remains connected to the tubular body 12, the end cap 11 is prevented from being lost.
In another possible implementation manner of the present invention, the end cap 11 may be detachably connected to the cylindrical body 12, and when the end cap 11 needs to be opened, the end cap 11 may be directly detached from the cylindrical body 12, and when the end cap 11 is closed, the end cap 11 may be mounted on the cylindrical body 12.
As shown in fig. 7, a sealing ring 112 may be disposed on the inner wall of the end cap 11 to improve the sealing performance between the end cap 11 and the cylindrical body 12 and prevent leakage during testing.
Fig. 8 is an external structural schematic diagram of an end cap according to an embodiment of the present invention. As shown in fig. 8, the outer side wall of the end cover 11 may further have a display screen 113 for displaying the detection length of the underwater pull rope sensor to be tested. The detection length of the underwater pull rope sensor is visually displayed through the display screen 113, namely, the displacement detected by the underwater pull rope sensor is convenient for testers to compare the detection length and the scale of the underwater pull rope sensor, and the underwater pull rope sensor is further convenient to test.
Illustratively, the display 113 may be a liquid crystal display, a light emitting diode display.
The test process of the test tool of the underwater pull rope sensor provided by the embodiment of the invention is briefly described as follows:
first, the end cap 11 is opened, the underwater pull rope sensor to be tested is installed inside the end cap 11, the pull rope 20 is connected to the pull rope of the underwater pull rope sensor, the end cap 11 is closed, and water is injected into the water containing cylinder 10 (if water is injected from the end cap 11, the end cap 11 may be closed after the water injection is completed).
Then, the ferromagnetic slider 50 is moved on the magnetic plate 40 along the length direction of the water containing barrel 10, so that the detection length of the underwater pull rope sensor is 0, that is, the displacement detected by the underwater pull rope sensor is 0, and the ferromagnetic slider 50 is attracted to the first scale position.
The ferromagnetic sliding block 50 is moved continuously to make the ferromagnetic sliding block 50 be adsorbed at the second scale position, and the distance S that the ferromagnetic sliding block 50 moves from the first scale position to the second scale position is determined by the scale on the magnetic plate 401Comparison S1And the detection length of the underwater pull rope sensor.
Continuing to move the ferromagnetic sliding block 50 to make the ferromagnetic sliding block 50 adsorbed at the third scale position, and determining the distance S that the ferromagnetic sliding block 50 moves from the first scale position to the third scale position according to the scales on the magnetic plate 402Comparison S2And the detection length of the underwater pull rope sensor.
The ferromagnetic sliding block 50 can be adsorbed at more different scale positions in the test process to perform more comparisons, so that the test accuracy is improved.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The test tool for the underwater pull rope sensor is characterized by comprising a water containing barrel (10), a traction rope (20), a pulley block (30), a magnetic plate (40) and a ferromagnetic sliding block (50), wherein the water containing barrel (10) comprises an end cover (11) and a barrel-shaped body (12) with one closed end, the end cover (11) is connected to the other end of the barrel-shaped body (12) in a manner that the end cover can be opened and closed relative to the barrel-shaped body (12), the magnetic plate (40) is installed on the outer side wall of the barrel-shaped body (12), scales distributed along the length direction of the barrel-shaped body (12) are arranged on the magnetic plate (40), the ferromagnetic sliding block (50) is slidably located on the magnetic plate (40), the pulley block (30) is installed at the closed end of the barrel-shaped body (12), and a rope outlet hole (12a) is formed in the side wall of the closed end of the barrel-shaped body (12, the utility model discloses a setting of drawing rope, including assembly pulley (30), haulage rope (20) are around establishing on assembly pulley (30), just haulage rope (20) are located go out in rope hole (12a), haulage rope (20) are located the outer one end of tube-shape body (12) with ferromagnetic slider (50) are connected, sensor mounting structure has on end cover (11), haulage rope (20) are located one end in tube-shape body (12) is used for being connected with the underwater stay cord sensor of awaiting measuring.
2. The test fixture of claim 1, wherein the magnetic plate (40) is slidably mounted on the cylindrical body (12) along a length of the cylindrical body (12).
3. The test tool according to claim 2, wherein a stopper (122) is arranged on the outer side wall of the cylindrical body (12), the magnetic plate (40) and the stopper (122) are sequentially arranged along the length direction of the cylindrical body (12), and a distance adjusting piece is arranged between the stopper (122) and the magnetic plate (40).
4. The test fixture according to claim 3, wherein the distance adjusting member comprises a threaded ejector rod (70), the threaded ejector rod (70) is in threaded connection with the stopper (122), and an end of the threaded ejector rod (70) is rotatably connected with the magnetic plate (40), or
The threaded ejector rod (70) is in threaded connection with the magnetic plate (40), and the end part of the threaded ejector rod (70) is rotatably connected with the stop block (122).
5. The test fixture of claim 4, wherein the threaded mandrel (70) is spherically shaped at its end.
6. The test tool according to claim 3, wherein the distance adjusting piece comprises a threaded sleeve (71), a first screw (72) and a second screw (73) which are coaxial, the thread turning directions of the first screw (72) and the second screw (73) are opposite, one end of the first screw (72) is fixed on the stop block (122), one end of the second screw (73) is fixed on the magnetic plate (40), and two ends of the threaded sleeve (71) are respectively in threaded connection with the first screw (72) and the second screw (73).
7. The test tool according to claim 2, wherein a sliding groove (60) is formed in the outer side wall of the cylindrical body (12), and the magnetic plate (40) is installed in the sliding groove (60).
8. The test tool according to any one of claims 1 to 7, wherein a hook (111) is arranged on the inner side wall of the end cover (11), and a rope ring (21) is arranged at one end of the traction rope (20) located in the cylindrical body (12).
9. The test tool according to any one of claims 1 to 7, wherein the water containing barrel (10) is provided with at least one pipe joint (13).
10. The test tool according to any one of claims 1 to 7, wherein a display screen (113) for displaying the detection length of the underwater pull rope sensor to be tested is arranged on the outer side wall of the end cover (11).
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| CN201910979298.8A CN110823151B (en) | 2019-10-15 | 2019-10-15 | Test tool for underwater pull rope sensor |
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| CN201910979298.8A CN110823151B (en) | 2019-10-15 | 2019-10-15 | Test tool for underwater pull rope sensor |
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